在数据库的舞台上,主从同步就像是一场华丽的舞蹈,而SHOW SLAVE STATUS
命令则是这场舞蹈的灯光,照亮了舞者的每一个动作和节奏。而今天,就让我们一起来解析MySQL中SHOW SLAVE STATUS
命令返回的字段,探索这些字段背后的故事吧!让我们更深入地了解数据库同步的神奇世界!
mysql> show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for source to send event
Master_Host: ubtone.local
Master_User: replicator
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000001
Read_Master_Log_Pos: 565
Relay_Log_File: mysql-relay-bin.000032
Relay_Log_Pos: 326
Relay_Master_Log_File: mysql-bin.000001
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 565
Relay_Log_Space: 705
Until_Condition: None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 1
Master_UUID: dd481083-020b-11ef-9e88-001c421d83c9
Master_Info_File: mysql.slave_master_info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Replica has read all relay log; waiting for more updates
Master_Retry_Count: 86400
Master_Bind:
Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set:
Executed_Gtid_Set:
Auto_Position: 0
Replicate_Rewrite_DB:
Channel_Name:
Master_TLS_Version:
Master_public_key_path:
Get_master_public_key: 0
Network_Namespace:
1 row in set, 1 warning (0.00 sec)
以下是对这些字段的详细解释:
ubtone.local
。
replicator
。
3306
,这是 MySQL 默认的端口号。
60
秒。
mysql-bin.000001
。
565
,表示从服务器已经读取了主服务器二进制日志文件中的前 565
个字节。
mysql-relay-bin.000032
。
326
,表示从服务器已经向中继日志文件写入了前 326
个字节。
mysql-bin.000001
。